Nano Research
·
2022
·Vol. 16
·期 6
·8269-8280
·
IF 10.269
Wu Hao,Song Ziyu,Wang Xingxing,Feng Wenfang,Zhou Zhibin,Zhang Heng
Effective passivation of aluminum (Al) current collector at high potentials (> 4.0 V vs. Li/Li + ) is of essence for the long-term operation of lithium-based batteries. Unfortunately, the non-aqueous liquid electrolytes comprising lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and organic carbonates are corrosive toward Al current collector at high potentials (> 4.0 V vs. Li/Li + ), despite their intriguing features (e.g., good chemical stability and high ionic conductivity). Herein, we propose the utilization of N,N-dimethyl fluorosulfonamide (DMFSA) as electrolyte solvent for suppressing Al corrosion in the LiTFSI-based electrolytes. It has been demonstrated that the electrolyte of 1.0 M LiTFSI-DMFSA shows decent ionic conductivities (1.76 mS·cm −1 at 25 °C) with good fluidities (2.44 cP at 25 °C). In particular, the replacement of organic carbonates (e.g., ethylene carbonate and ethyl methyl carbonate) with DMFSA leads to significant suppressed Al corrosion. Morphological and compositional characterizations utilizing scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) reveal that DMFSA favors the formation of insoluble species (i.e., aluminum fluoride (AlF 3 )) on the surface of Al electrode, which effectively inhibits continuous exposure of fresh Al surface to electrolyte during cycling. This work provides not only a deeper understanding on the Al corrosion in LiTFSI-based electrolyte but also an elegant path to stabilize the Al current collector at high potentials (> 4.0 V vs. Li/Li + ), which may give an impetus into the development of lithium-based batteries.
研究领域:
电化学
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材料科学
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储能技术
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腐蚀科学
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电池技术
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 48
·41813-41823
·
IF 9.5
Ying Meng,Rui Yin,Yanqi Wu,Jie Biao,Guohuang Kang,Feiyu Kang,Yidan Cao
The severe interfacial reaction between the lithium metal anode and the ester-based electrolyte hinders the application of lithium metal batteries. While lithium nitrate (LiNO3) can stabilize the electrode–electrolyte interface, its poor solubility in ester-based electrolytes limits its effectiveness. To address this, we develop a polymerized N,N-dimethylacrylamide (PDMAA)-mediated organic–inorganic composite artificial solid electrolyte interphase (SEI) formed via thermal polymerization of a precursor containing N,N-dimethylacrylamide (DMAA) and LiNO3. DMAA not only exhibits a high donor capacity, facilitating high-concentration LiNO3 dissolution, but also strongly coordinates with H2O molecules, effectively reducing the generation of aggressive hydrofluoric acid (HF) in the electrolyte. The abundant LiNO3 effectively contributes to stable, ion-conductive interphases on both the cathode and the anode. The artificial SEI, through synergistic organic–inorganic interactions, enables uniform lithium deposition, stabilizes the cathode structure, and suppresses the electrolyte hydrolysis. As a result, the symmetric cell achieves stable cycling for over 600 h with a low overpotential (∼34 mV), and the full cell maintains 81.6% capacity after 500 cycles. The cell also exhibits excellent rate-performance attributed to the enhanced interfacial kinetics and moisture-resistance capability due to the scavenging effect of water by PDMAA. This artificial SEI design strategy extends the applicability of LiNO3 in ester-based electrolytes for high-performance lithium metal batteries.
研究领域:
电化学
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能源材料
·
界面化学
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电池技术
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高分子化学
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无机化学
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电极过程
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储能系统
✓ 已验证
产品关联
DOI
高影响因子
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
·
2017
·
IF 1.361
Xiaoyan Li,Chen Qi,Peilian Wei,Lei Huang,Jin Cai,Zhinan Xu
Uridine 5′-diphosphate N-acetylglucosamine (UDP-GlcNAc) is a natural UDP-monosaccharide donor for bacterial glycosyltransferases, while uridine 5′-diphosphate N-trifluoacetyl glucosamine (UDP-GlcNTFA) is its synthetic mimic. The chemoenzymatic synthesis of UDP-GlcNAc and UDP-GlcNTFA was attempted by three recombinant enzymes. Recombinant N-acetylhexosamine 1-kinase was used to produce GlcNAc/GlcNTFA-1-phosphate from GlcNAc/GlcNTFA. N-acetylglucosamine-1-phosphate uridyltransferase from Escherichia coli K12 MG1655 was used to produce UDP-GlcNAc/GlcNTFA from GlcNAc/GlcNTFA-1-phosphate. Inorganic pyrophosphatase from E. coli K12 MG1655 was used to hydrolyze pyrophosphate to accelerate the reaction. The above enzymes were expressed in E. coli BL21 (DE3) and purified, respectively, and finally mixed in one-pot bioreactor. The effects of reaction conditions on the production of UDP-GlcNAc and UDP-GlcNTFA were characterized. To avoid the substrate inhibition effect on the production of UDP-GlcNAc and UDP-GlcNTFA, the reaction was performed with fed batch of substrate. Under the optimized conditions, high production of UDP-GlcNAc (59.51 g/L) and UDP-GlcNTFA (46.54 g/L) were achieved in this three-enzyme one-pot system. The present work is promising to develop an efficient scalable process for the supply of UDP-monosaccharide donors for oligosaccharide synthesis.
研究领域:
生物化学
·
酶学
·
合成生物学
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER SCIENCE SERIES A
·
2018
·Vol. 60
·期 5
·612-617
·
IF 0.729
Wang Jinjing,Wang Huifeng,Li Yan,Tian Li,Chen Shanmin,Liu Qiang,Guo Zhen
A novel copolymer surfactant has been prepared via a free radical copolymerization of CO 2 -switchable monomer N , N -diethylaminoethyl methacrylate and the hydrophilic monomer sodium vinyl-sulfonate and characterized. The results of conductivity, dynamic light scattering and cryogenic transmission electron microscopy study showed the change of the microstructure of copolymer in water by adding or removing of CO 2 . The copolymer aqueous solution was found to exhibit reversible switchability by the bubbling of CO 2 /N 2 .
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
International Journal of Nanomedicine
·
2013
·
IF 3.463
Xiao-juan Hu,Yang Liu,Xiao-feng Zhou,Qiao-ling Zhu,Yong-yan Bei,Ben-gang You,Chun-ge Zhang,Wei-liang Chen,Zhou-li Wang,Ai-jun Zhu,Xue-nong Zhang,Yu-jiang Fan
Novel amphiphilic chitosan derivatives (N-caprinoyl-N-trimethyl chitosan [CA-TMC]) were synthesized by grafting the hydrophobic moiety caprinoyl (CA) and hydrophilic moiety trimethyl chitosan to prepare carriers with good compatibility for poorly soluble drugs. Based on self-assembly, CA-TMC can form micelles with sizes ranging from 136 nm to 212 nm. The critical aggregation concentration increased from 0.6 mg • L −1 to 88 mg • L −1 with decrease in the degree of CA substitution. Osthole (OST) could be easily encapsulated into the CA-TMC micelles. The highest entrapment efficiency and drug loading of OST-loaded CA-TMC micelles(OST/CA-TMC) were 79.1% and 19.1%, respectively. The antitumor efficacy results show that OST/CA-TMC micelles have significant antitumor activity on Hela and MCF-7 cells, with a 50% of cell growth inhibition (IC50) of 35.8 and 46.7 μg. mL −1 , respectively. Cell apoptosis was the main effect on cell death of Hela and MCF-7 cells after OST administration. The blank micelles did not affect apoptosis or cell death of Hela and MCF-7 cells. The fluorescence imaging results indicated that OST/CA-TMC micelles could be easily uptaken by Hela and MCF-7 cells and could localize in the cell nuclei. These findings suggest that CA-TMC micelles are promising carriers for OST delivery in cancer therapy.
研究领域:
药学
·
生物技术
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 36
·7274-7284
·
IF 3.879
Xiu-Li Wang,Fang-Fang Sui,Hong-Yan Lin,Chuang Xu,Guo-Cheng Liu,Ju-Wen Zhang,Ai-Xiang Tian
Six new transition metal coordination polymers, namely, [Co(1,2-BDC)(L)1.5(H2O)] (1), [Co(1,3-BDC)(L)(H2O)2]·H2O (2) [Co(5-AIP)(L)0.5(H2O)]·2H2O (3), [Cu(1,2-BDC)(L)] (4), [Cu(1,3-BDC)(L)(H2O)]·3H2O (5), and [Cu2(5-AIP)2(L)2(H2O)]·6H2O (6) (L = N,N′-di(3-pyridyl)octanediamide, 1,2-H2BDC = 1,2-benzenedicarboxylic acid, 1,3-H2BDC = 1,3-benzenedicarboxylic acid, 5-H2AIP = 5-aminoisophthalic acid), have been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction. In compound 1, the adjacent CoII ions are connected by L ligands to form a 1D chain with an alternating arrangement of L ligands and Co2L2 dinuclear loops. The 1,2-BDC anions coordinate with one CoII ion in a bis(monodentate) chelate mode. Complex 2 shows a 2D (44) grid network with the sql topology, which consists of the 1D zigzag [Co–L]n chain and 1D linear [Co-1,3-BDC]n chain. When 5-H2AIP is used in compound 3, an interesting 2D terraced-type layer based on 1D [Co-5-AIP]2n ladder-like chains and μ2-bridging L ligands with 3,4-connected {62.10}{6} topology is formed. Under the similar conditions to compound 1, except that the cobalt(II) salt is replaced by a copper(II) salt, a 2D wave-like network 4 with 2,4-connected {64.8.10}{6} topology is obtained. Compound 5 displays a 3D coordination polymeric architecture based on 1D [Cu-1,3-BDC]n chains and [Cu–L]n chains, which represents an intriguing 3-fold interpenetrating framework with CdSO4-type topology. When 1,3-BDC is replaced by 5-AIP, another 3-fold interpenetrating 3D CdSO4-type coordination framework for compound 6 is obtained, which is constructed from three types of 1D chains: [La–Cu–Lc]n chain, [Lb–Cu–Lb]n chain and [Cu-5-AIP]n chain. The adjacent 1D chains for 1 and 2D layers for compounds 2, 3 and 4 are further extended by hydrogen bonding interactions to 3D supramolecular frameworks. The effect of dicarboxylates and central metals on the structures of the title complexes has been discussed. Furthermore, the electrochemical behaviors and solid state fluorescent properties for compounds 1–6 are investigated.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Ming-Yang He,Pin-Xi Wang,Jun-Qing Ye,Wen-Wen Chen,Jun-Feng Qian,Qun Chen
The development of highly active catalysts for the direct synthesis of N,N’-diphenylurea (DPU) from CO 2 and aniline is crucial yet has faced significant challenges. This study introduces a metal oxide composite catalyst, Cu x Fe 0.5 Ce 0.5 , synthesized via a one-step co-precipitation method. This catalyst features both acidic and basic active sites that synergistically catalyze the conversion of CO 2 and aniline into DPU with high efficiency. It achieved an aniline conversion rate of up to 33.0 % and an exceptional DPU selectivity of 99.9 %. Comprehensive characterizations confirmed that the catalyst possesses well-defined morphology, controlled size, optimized pore structure, and robust acid-base properties, along with abundant oxygen vacancies. Specifically, CuFe components function as Lewis base sites, effectively activating CO 2 molecules, while Ce 3+/4+ species serve as Lewis acid sites, facilitating the adsorption and activation of aniline to form key intermediates. Importantly, the presence of oxygen vacancies enhances electronic interactions between CeO 2 and metals, increasing metal electron density and providing critical active sites for CO 2 adsorption and activation, thus promoting the efficient catalytic reaction progression. Moreover, the catalyst demonstrates excellent reusability, maintaining approximately 95 % of its catalytic efficiency after five cycles. This work provides an innovative approach to developing efficient catalysts for the valorization of CO 2 into higher value-added chemicals.
研究领域:
催化化学
·
材料科学
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Dong Wang,Malcolm A. Kelland,Ying Xu,Xin Wang,Ping Lu,Jian Dong
Rapid formation of natural gas clathrate hydrates has been a significant hazard in off-shore natural gas drilling and gas transport. During operation, polymer inhibitors can serve as low-dosage kinetic inhibitors to prevent the formation of gas hydrates. A comprehensive consideration of the multiple factors involved in the actions of kinetic hydrate inhibitors (KHIs) can elucidate the inhibiting behavior of polymers. Here, amphiphilic poly(N-isopropylmethacrylamide) (PNIPMAm) (or poly(N-isopropylacrylamide)) are found to achieve weak to strong inhibition by the variable superimposed effect of the polymer’s amide group and hydrophobic effect of the polymer’s alkyl groups on the aqueous phase. The interfacial and bulk water mobility and hydrogen bonding energy in the polymer solutions are compared by low-temperature nuclear magnetic resonance (NMR) relaxometry. The mobility of the water is found to be sensitive to the hydrophobic α-methyl side group in PNIPMAm and its molecular weight when a guest molecule tetrahydrofuran is present. The water hydrogen bonding energies measured from NMR are also associated with the nonfreezable bound water amount revealed by differential scanning calorimetry. The α-methyl side group leads to a significant reduction of the water mobility, an increase in the hydrogen bonding energies of the interfacial water, and a decrease of the hydrate growth rate constants by 2 to 3 orders of magnitude. The retarded reaction kinetics of heterogeneous hydrate growth can be related to the hydrophobic effect of the polymer’s α-methyl side group and bound water properties (mobility and amount) in the interface.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Haiyang Wang,Fujun Li,Wenbo Yang,Yuchao Wang,Alexander A. Miskevich,Valery A. Loiko,Lijing Zhang,Shengyang Tao
The mechanistic understanding of how alkylamines impact Ni-metallophotoredox C–N coupling to form diarylamines remains unclear. In this study, 12-alkylamines were evaluated as additives to determine their effects on the synthesis of diarylamines in a flow photochemical system. Notably, n-hexylamine demonstrated the most significant promotional effect. Spectroscopic studies and experimental data reveal n-hexylamine substitutes DABCO as a Ni catalyst ligand, enhancing yields particularly in sterically hindered arylamines.
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 12
·1015
·
IF 3.504
Liangfeng Zhang,Simin Liu,Yuhua Wang,Haijun Zhang,Feng Liang
A series of gold nanoparticles (AuNPs) was prepared in situ with different cucurbit[n]urils (CB[n]s) in an alkaline aqueous solution. The nanoparticle sizes can be well controlled by CB[n]s (n=5,6,7,8) with different ring sizes. The packing densities of CB[5–8] and free surface area on AuNPs were determined. A direct relationship was found between the ring size and packing density of CB[n]s with respect to the AuNP-catalyzed reduction of 4-nitrophenol in the presence of NaBH4. The larger particle size and higher surface coverage of bigger CB[n]-capped AuNPs significantly decreased the catalytic activity. Furthermore, this work could lead to new applications that utilize AuNPs under an overlayer of CB[n]s for catalysis, sensing, and drug delivery.Keywords:gold nanoparticles;cucurbit[n]urils;controllable synthesis;catalysis
研究领域:
化学
·
材料科学
·
催化
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Ziliang Yuan,Xun Li,Guanghui Wang,Zhihua Zhu,Yuhe Liao,Zehui Zhang,Bing Liu
The selective hydrogenation of N -heteroarenes into N -heterocycles is a highly important organic transformation in fine chemical industry, as N -heterocycles are moieties in a variety of pharmaceutical and bioactive compounds. Here, we report highly efficient mesoporous CeO 2 supported Ni catalysts prepared by the incipient wet impregnation and following high-temperature reduction for the selective hydrogenation of N -heteroarenes. The experiments indicated that the synergistic effect between CeO 2 and Ni nanoparticles was responsible to the superior catalytic performance. Various kinds of N -heterocycles were obtained at 120 °C with yields of 86 ∼ >99%, demonstrating the versatility of the developed method. This work is valuable for guiding the design and manipulation of low metal loading, cost-effective and robust hydrogenation catalysts.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of CO2 Utilization
·
2023
·
IF 7.7
Shibo Yuan,Peng Bai,Yi He,Jiafa Chen,Yicheng Zhao,Yongdan Li
Photocatalytic N-formylation of amines with CO 2 is a promising strategy to convert CO 2 into value-added chemicals sustainably. In this work, a black TiO 2 -supported Cu photocatalyst is prepared through a solvothermal method for the N-formylation of N-methylaniline with NaBH 4 as the reducing agent. Cu nanoparticles and oxygen vacancies are formed on the surface of the photocatalyst after reduction with H 2 , which decreases the band-gap energy and promotes the separation of photogenerated electrons and holes, thereby improving the photocatalytic activity remarkably. A 100 % conversion is achieved after 9 h radiation, and the yield of N -methylformanilide reaches 81 %. Both the amount of NaBH 4 and the pressure of CO 2 show important influences on the activity and selectivity of the photocatalytic process, and the carbon and hydrogen in the aldehyde group are from CO 2 and NaBH 4 , respectively. The photocatalyst also shows promising cycling durability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）